Downtown dirty bomb?

Just heard on the radio that FBI is searching for a dirty bomb in Boston...supposedly another FBI office had a lead that someone was trying to detonate a DB in Boston...hmmm should I ask to go home early?

Federal and state authorities are investigating a nuclear terrorist threat against Boston after a man calling from Mexico told California police that he smuggled two Iraqis and four Chinese over the border, the Boston Herald has learned. ...

And boston.com says, well, it's hard to say what boston.com says because they've launched their redesign and so the main story keeps changing every 30 seconds, but it looks like they don't have anything at all about this story, at least as I type this around 4:30 p.m.

Update: boston.com reports on the story around 5 p.m. (and unlike the Herald, their servers can stand up to being Farked):

The FBI has triggered a massive manhunt for six people -- four Chinese and two Iraqis -- who may pose a terrorist threat to the city of Boston, law enforcement officials briefed on the threat said today. ...